Content .. 487 488 489 490 ..

Nissan Rogue. Manual - part 489

EC-224

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0127 IAT SENSOR

P0127 IAT SENSOR

DTC Description

INFOID:0000000011277973

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (Intake air temperature sensor circuit is open or shorted.)

• Intake air temperature sensor

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road

test is expected to be easier, it is unnecessary to lift the vehicle.

>> GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1. Wait until engine coolant temperature is less than 96

°C (205°F)

Turn ignition switch ON.

Select “DATA MONITOR” mode of “ENGINE” using CONSULT.

Check the engine coolant temperature.

If the engine coolant temperature is not less than 96

°C (205°F), turn ignition switch OFF and cool down

engine.

NOTE:

Perform the following steps before engine coolant temperature is above 96

°C (205°F).

2. Turn ignition switch ON.

3. Select “DATA MONITOR” mode of “ENGINE” using CONSULT

4. Start engine.

5. Hold vehicle speed at more than 70 km/h (43 MPH) for 100 consecutive seconds.

CAUTION:

Always drive vehicle at a safe speed.

6. Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected?

YES

>> Proceed to

EC-224, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000011277974

CHECK INTAKE AIR TEMPERATURE SENSOR

Check the intake air temperature sensor. Refer to

EC-225, "Component Inspection"

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0127

IAT SENSOR-B1
(Intake air temperature too high)

Rationally incorrect voltage from the sensor is sent to ECM, compared with
the voltage signal from engine coolant temperature sensor.

P0127 IAT SENSOR

EC-225

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

Is the inspection result normal?

YES

>> GO TO 2.

>> Replace mass air flow sensor (with intake air temperature sensor). Refer to

EM-26, "Exploded

View"

CHECK INTERMITTENT INCIDENT

Refer to

GI-44, "Intermittent Incident"

>> INSPECTION END

Component Inspection

INFOID:0000000011277975

CHECK INTAKE AIR TEMPERATURE SENSOR

1. Turn ignition switch OFF.

2. Disconnect mass air flow sensor harness connector and reconnect it again.

3. Turn ignition switch ON.

4. Select “DATA MONITOR” mode with CONSULT.

5. Check that “INT/A TEMP SEN” indicates as per following condition.

Is the inspection result normal?

YES

>> INSPECTION END

>> Replace mass air flow sensor (with intake air temperature sensor). Refer to

EM-26, "Exploded

View"

Monitor item

Condition

Value

(Approx.)

INT/A TEMP SEN

Temperature [

°C (°F)]

25 (77)

1.9 - 2.1 (V)

EC-226

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0128 THERMOSTAT FUNCTION

P0128 THERMOSTAT FUNCTION

DTC Description

INFOID:0000000011277976

DTC DETECTION LOGIC

Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long

enough.

This is due to a leak in the seal or the thermostat being stuck open.

POSSIBLE CAUSE

• Thermostat

• Leakage from sealing portion of thermostat

• Engine coolant temperature sensor

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

NOTE:

Never refuel before and during the following procedure.

CHECK DTC PRIORITY

If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303 or P0304, first perform the trouble diagno-

sis for DTC P0300, P0301, P0302, P0303 or P0304.
Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to

EC-96, "DTC Index"

>> GO TO 2.

PRECONDITIONING-1

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 3.

PRECONDITIONING-2

With CONSULT

1. Turn ignition switch ON.

2. Check the following conditions:

3. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.

4. Check the following conditions:

Is the condition satisfied?

YES

>> GO TO 4.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0128

THERMSTAT FNCTN
[Coolant thermostat (coolant temperature
below thermostat regulating temperature)]

The engine coolant temperature does not reach to specified temperature
even though the engine has run long enough.

Ambient temperature

−10°C (14°F) or more

A/C switch

OFF

Blower fan switch

OFF

COOLAN TEMP/S

−10°C – 58°C (14 – 136°F)

P0128 THERMOSTAT FUNCTION

EC-227

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

>> 1. Satisfy the condition.

2. GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE-1

With CONSULT

1. Start engine.

2. Drive the vehicle until the following condition is satisfied.

CAUTION:

Always drive vehicle at safe speed.

STEP 1

Drive the vehicle under the conditions instructed below until the difference between “COOLAN TEMP/S” and

“FUEL T/TMP SE” becomes at least 26

°C (47°F).

*: Example

STEP 2

Drive the vehicle at 50 km/h (32 MPH) or more with the difference between “COOLAN TEMP/S” and “FUEL

T/TMP SE” maintained at 26

°C (47°F) or more.

NOTE:

Keep the accelerator pedal as steady as possible during cruising.

STEP 3

Drive the vehicle at 50 km/h (32 MPH) or more until “COOLAN TEMP/S” increases by 6

°C (11°F).

NOTE:

Keep the accelerator pedal as steady as possible during cruising.

Is the condition satisfied?

YES

>> GO TO 5.

>> GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1. Drive the vehicle until the following condition is satisfied.

CAUTION:

Always drive vehicle at safe speed.

2. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to

EC-227, "Diagnosis Procedure"

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000011277977

CHECK DTC PRIORITY

If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303 or P0304, first perform the trouble diagno-

sis for DTC P0300, P0301, P0302, P0303 or P0304.
Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to

EC-96, "DTC Index"

>> GO TO 2.

COOLAN TEMP/S

°C (151°F) or less

FUEL T/TMP SE

Less than the value calculated by sub-
tracting 26

°C (47°F) from “COOLAN

TEMP/S”.*

COOLAN TEMP/S

FUEL T/TMP SE

°C (158°F)

°C (111°F) or less

°C (149°F)

°C (102°F) or less

°C (140°F)

°C (93°F) or less

COOLAN TEMP/S

°C (153°F) or more

Content .. 487 488 489 490 ..